Witch statement best describes the theory of natural selection?

europeans carried a hidden enemy to the indians: new diseases. native peoples of america had no immunity to the diseases that european explorers and colonists brought with them. diseases such as smallpox, influenza, measles, and even chicken pox proved deadly to american indians

i do not have access to the graph, but from 2001 to 2011 the rate of unemployment in the united states changed drastically. it remained relatively steady, at 5 percent, on average (4.4 percent in 2006 due to the economic expansion and 6 percent in 2002 as a result of the elevated costs of the war of terror) until 2008. it was then when the financial crisis, the worst since the great depression of 1929, occurred. during the recession that followed, the unemployment rate reached almost 10 percent in 2009, and in 2010 it was above 9 percent. by 2011 job losses had been continuous and prolonged for months, but the rate decreased timidly.